Ortech Fire-Damper-Odc Fire Damper for The Next Generation Compact Series Fans Only

Fire Resistant: Up to 3 hours Has a flexible fire blanket Link that is of +165°F Standard Spring steel rolled springs included 21 gauge Galvanized steel for frame Ceiling radiation damper with 3 hour rating Includes fiberglass cover and ceramic fiber 25 gauge Galvanized steel for Damper Adapter The force of one springs is no less than 4.496 lbf Comes with roll-framed frame made of galvanized steel